EP 0645764 B1 20001129 - Method and apparatus for phase modulated servo positioning in a direct access storage device
Title (en)
Method and apparatus for phase modulated servo positioning in a direct access storage device
Title (de)
Verfahren und Vorrichtung zur Positionnierung mittels Phasenmodulation in einer Speichereinheit mit direktem Zugriff
Title (fr)
Méthode et appareil pour le positionnement avec asservissement de phase modulée dans une unité de stockage à accès direct
Publication
Application
Priority
US 12595993 A 19930923
Abstract (en)
[origin: EP0645764A2] A phase modulated servo method and apparatus are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data. At a predefined location of the disk surface a series of servo tracks of a predetermined high gain servo pattern are written. The predetermined high gain servo pattern includes 360 DEG phase difference information within each data cylinder. The servo tracks are detected for identifying servo phase information. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 5/596 (2006.01); G11B 21/10 (2006.01)
CPC (source: EP KR US)
G11B 5/59622 (2013.01 - EP US); G11B 5/59683 (2013.01 - EP US); G11B 5/59688 (2013.01 - EP US); G11B 20/16 (2013.01 - KR)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0645764 A2 19950329; EP 0645764 A3 19960911; EP 0645764 B1 20001129; AT E197852 T1 20001215; BR 9403557 A 19950620; CA 2127971 A1 19950324; CA 2127971 C 19990112; CN 1064168 C 20010404; CN 1110824 A 19951025; DE 69426345 D1 20010104; DE 69426345 T2 20010517; ES 2152972 T3 20010216; JP H07169032 A 19950704; KR 100191903 B1 19990615; KR 950009677 A 19950424; MY 113278 A 20020131; SG 47385 A1 19980417; US 6426844 B1 20020730
DOCDB simple family (application)
EP 94480084 A 19940906; AT 94480084 T 19940906; BR 9403557 A 19940914; CA 2127971 A 19940713; CN 94115592 A 19940830; DE 69426345 T 19940906; ES 94480084 T 19940906; JP 20619194 A 19940831; KR 19940021533 A 19940830; MY PI19942268 A 19940829; SG 1996000355 A 19940906; US 52619795 A 19950911